本文主要記錄一下平時用到的工具類
本類作用是查詢某個路徑下所有文件,獲取文件名輸出到Excel表格中
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
public class FileTest {
/**
* 獲取路徑下的所有文件/文件夾
* @param directoryPath 需要遍歷的文件夾路徑
* @param isAddDirectory 是否將子文件夾的路徑也添加到list集合中
* @return
*/
public static List<String> getAllFile(String directoryPath,boolean isAddDirectory) {
List<String> list = new ArrayList<>();
File baseFile = new File(directoryPath);
if (baseFile.isFile() || !baseFile.exists()) {
return list;
}
File[] files = baseFile.listFiles();
for (File file : files) {
if (file.isDirectory()) {
if(isAddDirectory){
list.add(file.getAbsolutePath());
}
list.addAll(getAllFile(file.getAbsolutePath(),isAddDirectory));
} else {
// list.add(file.getAbsolutePath());//保存文件所在路徑
list.add(file.getName());//保存文件名
}
}
return list;
}
/**
* 針對路徑或文件名導出的操作
*
* @param list
*/
public static void excleOut(List<String> list) {
// 創建Excel文檔
HSSFWorkbook hwb = new HSSFWorkbook();
// 通過excle對象創建一個選項卡對象
HSSFSheet sheet = hwb.createSheet("sheet1");
String path = null;
// 循環list創建行
for (int i = 0; i < list.size(); i++) {
// 新建一行
HSSFRow row = sheet.createRow(i);
path = list.get(i);
// 設置i+1行第0列的數據
row.createCell(0).setCellValue(path);
}
OutputStream out = null;
try {
out = new FileOutputStream("E:/demo.xls");
hwb.write(out);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public static void main(String[] args) {
List<String> allFile = getAllFile("E:\\", false);
List<String> list1 = new ArrayList<>();
for (String s : allFile) {
list1.add(s);
}
excleOut(list1);
System.out.println(allFile.size());
}
}